Preheat the oven to 350℉. While the oven is preheating, mash up the bananas, more bananas equals moister bread. Cream the butter and sugar together, and crack the two eggs in a bowl and stir well. Add all of these to a bowl, add flour, backing soda, salt, and vanilla. Mix until combined, be careful not to over mix.
Get a loaf pan or cake pan and grease and flour the sides. Once greased and floured pour the mixture into the pan. Once the oven is heated put the pan in the oven for 55-60 minutes.